Henry



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HENRY t). DEMAREST, OF NEW YORK, N. Y.

Letters Patent No. 63,227, dated .dl-arch Z5, 1857.

IMPROVEMENT IN AUTOMATIC BQILER-FBEDERS.

TO ALL WI-IOM IT MAY CONCERN:

Be it known that I, HENRY O. DEMAREST, of the city, county, and Stn-te of New York, have invented a new and improved Automatic Boiler-Feed; and I do hereby dechire that the following is a full, clear, and' exact description thereof, which will enable others skilledy in the art to make and use the saine, reference being had to the accompanying drawings, forming part ci this specification, in which- Figure 1 represents a side elevation of this invention.

Figure :2 is a plan or top View of the same partly in section,

Figure 3 is a transverse vertical section ot' the same.

Figure 4 is an inside elevation of one of the end pieces or seats detached.

Figure 5 is an end view of the rocking-chambers detached.

Similar letters o" reference indicate like parts.

This invention relates to a boiler-t`eeil, which consists principally ot' two chambers which oscillate on a suitnblerod, their ends being faced off i-nd ground sl'caiii-tiglitagainst seats which are formed by the end pieces of a suitable traine. Suitable channels iu tlic seals and chambers allow said chambers to till and discharge alterW iifitely, each chamber when full being iliade to descend by its own gravity, and in descending it opens the communication with the steam boiler, and if the water in the boiler is below the desired level steam is admitted to said elianiber and the water contained in it sinks down int-o the boiler, and while one chamber discharges the other fills, :intl an automatic boiler-feed is obtained, which, when once properly adjusted, requires no further attention.

A represents the bed-plato of my apparatus, from which rise two check pieces B B', the inner surfaces of which are planed off parallel to each other and form the seats for the ends of the oscillating chambers C C. These chambers are 'supported by a central rod, a, on which they are perfectly balanced, Aso that it' a. certain weight is added to one of the chambers it will sink down, causing thc other chamber to rise until one of the chambers cornes in Contact with a suitable stop, 1i. The ends oi' the chambers C C are ground steam-tight ,against the seats B B', and said Ychambers are provided each with two apertures c c* in each end, one near the top and one near the bottom otn the chamber, as shown in gs. 3 and 5 of the drawing. The seats B B are pro. vided with passages (l dit, and the passages Z in theA seat B connect with the water-supply tank, while the passages connect with a pipe, c, which extends down into the boiler, terminating at the level of the mean water line. The passages d in the seat B connect with the waste pipe-f, which may be made to return to the supply tank, and the passages d* in said seat connect with a pipe, g, which extends down into the boiler. The aper- :tures d (itin the seats are so situated that if the apertures c 01u the ends of the chambers Ccoincide with the apertures cZ in the seats B B', the apertures in the ends of the chamber B coincide with the apertures ci* in the seats B B', and vice verso, according to the position of the chambers. The connection between the seat B and the supplyltanli is effected by a pipe, 7i, which leads to a chamber, 2', and from this chamber extends a pipe, j, to the supply tank, and another pipe c to thc steam space of the boiler. This latter pipe is at right angles with the supply pipcj, and it is provided with a nozzle, Z, (see iig. 2,) so that it acts on the principle of Gifards injectoiicausing the water to flow into either of the chambers C or C against any pressure which may yet exist in the same.

The operation is as follows: If the water in the boiler sinks below the mean water line, and if the chambers C C are in the position shown in iig. 3, steam 'from the boiler passes up through the pipe e and fills the upper part of the chamber C", causing the water contained therein to sink down into the boiler through the'pipe g. At the saine time the chamber C is in communication with the supply tank and lls with water As soon as the chamber C is empty and the chamber C full, the latter, beingnow the heaviest, sinks down, and the connection between the chambers, the supply tank, and the boiler, is changed. he chamber C discharges into the boiler and the chamber C fills. If the water in the boiler rises above the mean water line, the mouth of the pipe e is closed, and the water in the chambers is prevented from flowing down into the boilein The oscillating motion of the chamber ceases and the water flowing into that chamber which happens to be up discharges through the waste pipe f, which inlay lead fbaclc to the .supply tank. By these means a boilerefeed is obtained which works perfectly automatically, which is not liable to get out of order, and which when once properly adjusted 1vill keep up a uniform supply of water to the boiler without requiring any further attention.

What I claim as new, and desire to secure by Letters Patent, is-

'llle Oscillating chambers C C', with apertures c 0*, in combination with the seats B B', apertures d di, pipes e g, and injector by' lc, all constructed and operating substantially as and,y for the purpose described.

The above specification oi' my 'invention signed by ine this 2211 day of June, 1866.

HENRY O. DEMAREST.

Witnesses WM. F. MQNAMARA, ALEX. F. ROBERTS. 

